Tomas Nido is the odd man out.
The longtime Mets stalwart has been designated for assignment, the club announced Monday.
Omar Narvaez has been activated and will return Tuesday in Atlanta, joining Francisco Alvarez as the Mets’ catching tandem.
The veteran Narvaez said Sunday he is “100 percent” after playing in six rehab games, bouncing back from a calf strain.
The 21-year-old rookie Alvarez has blasted eight home runs in his first 38 games and posted a .783 OPS, forcing his way to a major league spot.
The Mets will carry two catchers rather than three, which would have hamstrung the club’s flexibility.
Other options would have included optioning Mark Vientos or designating Daniel Vogelbach for assignment.
Nido, who was locked up for a two-year, $3.7 million pact during the offseason, has long been well-regarded defensively but did not hit enough to win the spot.
With eye issues that required an IL stint, Nido batted .125 without a home run in 22 games this season.
Nido was a Mets eighth-round pick in 2012 and was playing in his seventh major league season with the club, a reliable backup catcher whose time ran out.
Sunday night, Nido posted a peace sign and a saluting emoji on Instagram, appearing to say goodbye.